
Gerald Holmes, California Polytechnic State University at San Luis Obispo, Bugwood.org
While some powdery mildews attack a very few specific plants, others have a broad host range and infect many different plants. It is important to recognize this because if a particular powdery mildew is infecting a plant in your nursery or greenhouse, you need to know what other plants might be at risk to the fungus as you decide what plants should be treated with a fungicide.
Host Plant | Golovinomyces chicoracearum | Erysiphe polygoni | Phyllactinia guttata | Sphaerotheca fuliginea | Podosphaera macularis | Podospheara pannosa | Microsphaera penicillata | Podosphaera clandestina | Podosphaera xanthii | Leveillula taurica |
---|
Acer | | | X | X | | | X | | | |
Achillea | X | | | | | | | | | |
Aesculus | | | X | | | | | | | |
Agastache | | | | X | X | | | | | |
Ageratum | X | | | | | | | | | |
Ajuga | X | | | | | | | | | |
Alnus | | | X | | | | X | | | |
Amelanchier | | X | X | | | | | X | | |
Angelonia | X | | | | | | | | | |
Antirrhinum | X | | | | | | | | | |
Artemesia | X | | | | | | | | | |
Aquilegia | | X | | | | | | | | |
Asclepias | X | | X | | | | | | | |
Aster | X | | | | | | | | | |
Astilbe | | X | | | | | | | | |
Baptista | | X | | | | | X | | | |
Begonia | X | X | | | | | | | | |
Berberis | | | X | | | | | | | |
Betula | | | X | | | | X | | | |
Bidens | X | | | X | X | | | | | |
Boltonia | X | | | | | | | | | |
Calendula | X | X | | | | | | | | |
Callistephus | X | X | | | | | | | | |
Campanula | X | | | | | | | | | |
Capsicum | X | | | | | | | | | |
Carica | X | | | | | | | | | |
Carpinus | | | X | | | | | | | |
Castanea | | | X | | | | | | | |
Catalpa | | | X | | | | | | | |
Ceanothus | | X | | | X | | X | | | |
Centaurea | X | | | | | | | | | |
Chysanthemum | X | | | | | | | | | |
Clematis | | X | | | | | | | | |
Coreopsis | X | | | | | | | | | |
Cornus | | | X | | X | | X | | | |
Corylus | | | X | | X | | X | | | |
Crassula | | | | | | | | | | |
Crataegus | | | X | | | | | X | | |
Cosmos | X | | | | | | | | | |
Crotalaria | | X | | | | | | | | |
Cucumis | X | X | | X | | | | | | |
Cucurbita | X | X | | X | | | | | X | |
Cuphea | | X | | | | | | | | |
Dahlia | X | X | | | | | | | | |
Daucus | | X | | | | | | | | |
Delphinium | X | X | | | X | | | | | |
Eucalyptus | X | | | | | | | | | |
Euonymus | | | | | | | X | | | |
Fagus | | | X | | | | X | | | |
Fragaria | | | X | X | X | | | | | |
Fraxinus | X | | X | | | | X | | | |
Gaillardia | X | | | X | X | | | | | |
Gardenia | | X | | | | | | | | |
Gaura | | X | | | | | | | | |
Gleditsia | | | | | | | X | | | |
Geranium | | X | | X | X | | | | | |
Gerbera | X | | | X | X | | | | | |
Geum | | | | | | | | | | |
Gloxinia | X | | | | | | | | | |
Hedera | X | | | | | | | | | |
Helenium | X | | | | | | | | | |
Helianthus | X | X | | | | | | | | X |
Heliopsis | X | | | | | | | | | |
Heuchera | X | | X | X | X | | | | | X |
Hibiscus | X | | | | | | | | | |
Hieracium | X | X | | | | | | | | |
Hydrangea | | | | | | | X | | | |
Hypericum | x | X | | | | | | | | |
Iberis | | | | | | | | | | |
Ilex | | | X | | | | X | | | |
Juglans | | | X | | | | X | | | |
Kalanchoe | | | | X | | | | | | |
Kalmia | | | | | | | X | | | |
Lactuca | X | | X | X | | | | | | |
Lagenaria | X | | | | | | | | | |
Lamium | X | | | | | | | | | |
Leucothoe | | | | | | | X | | | |
Liatris | X | | | | | | | | | |
Linaria | X | | | | | | | | | |
Liriodendron | | X | X | | | | | | | |
Lithospermum | X | | | | | | | | | |
Lonicera | | X | | | | | X | | | |
Lupinus | | X | | | | | | | | X |
Lycopersicon | | X | | | | | | | | |
Magnolia | | | X | | | | X | | | |
Malus | | | X | X | X | | | X | | |
Matricaria | X | | | X | X | | | | | |
Medicago | | X | | | | | | | | |
Mentha | X | X | | X | X | | | | | |
Mimulus | X | | | | | | | | | |
Monarda | X | | | | | | | | | |
Myosotis | X | | | | | | | | | |
Nicotiana | X | | | | | | | | | |
Oenothera | | X | | | | | | | | |
Paeonia | | X | | | | | | | | |
Papaver | | X | | | | | | | | |
Penstemon | X | | | | | | | | | |
Phaseolus | | X | | | | | | | | |
Phlox | X | | | X | X | | | | | |
Pisum | | X | | | | | | | | |
Plantago | X | | X | X | X | | | | | |
Plantanus | | | | | | | X | | | |
Polygonum | | X | X | | | | | | | |
Populus | X | X | X | | | | | | | |
Potentilla | | X | | X | X | | | | | |
Primula | | X | | | | | | | | |
Prunus | | | X | | | X | | X | | |
Quercus | | X | X | | | | X | | | |
Ramunculus | | X | | | X | | | | | |
Rhododendron | | X | | | | X | X | | | |
Rhus | X | | X | | X | X | | | | |
Ribes | | | | X | X | | | | | |
Robinia | | X | X | | | | | | | |
Rosa | | | X | X | X | X | | | | |
Rubus | | | X | | X | | | | | |
Rudbeckia | X | | X | | | | | | | |
Rumex | | | X | | | | | | | |
Salix | | | | | | | | | | |
Salvia | X | | | | | | | | | |
Sassafras | | | X | | | | | | | |
Saxifraga | | | | X | X | | | | | |
Scabiosa | | X | | | | | | | | |
Scrophularia | X | | | | | | | | | |
Sedum | | X | | | | | | | | |
Senecio | X | | | X | X | | | | | |
Solanum | X | | | | | | | | | |
Solidago | X | | X | X | | | | | | |
Spirea | | | | X | X | | X | X | | |
Stachys | X | | | | X | | | | | |
Stokesia | X | | | | | | | | | |
Syringa | | | | | | | X | | | |
Taraxacum | X | | X | X | X | | | | | |
Tiarella | | | | X | | | | | | |
Tilia | | | X | | | | X | | | |
Trifolium | X | X | | | | | X | | | |
Ulmus | | | X | | | | X | | | |
Vaccinium | | | X | | | | X | | | |
Verbascum | X | | | | | | | | | |
Verbena | X | | | | | | | | X | |
Veronica | | | | X | X | | | | | |
Viburnum | | | | | | | X | | | |
Vigna | | X | | | | | | | | |
Viola | | | | X | X | | X | | | |
Zinnia | X | | | | | | | | | |